Self-loading device for shaker conveyers



Feb- 29, 1944- L. D. HAGENBOOK SELF-LOADING' DEVICE FOR SHAKER CONVEYERS Filed Oct. 7. 1942 '7 Sheets-Sheet 1 Feb. 29, 1944. D. HAGENBooK 2,343,144

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y Mm m, To *www @fm ma r v4 MQ W Wi Feb., 29, 1944. l.. D. HAGENBo'oK SELF-LOADING DEVICE FOR SHAKER CONVEYERS Filed Oct. '7. 1942 '7 Sheets-Sheet 6 INI/ENTOR. ZOVD. Hiffvoak lfholdingrneohanismfor the extensible Atroughisecrocatng Iand extensible trough lsections Jof conveyer.

Patented Feb. 29, 1944l y U-Niflfifo STATES rATENT.

OFFICE ASIELFJLO'ADING DEVICE FOR SHAKER l- V`CONVEYERS l xLoy D..'Hageribc`ok,`Chicago, Ill., assignor to Goodman :Manufacturing C'ompan'y,"Chicag`o, Ill., 'a n corporation voi :Illinois Application October 7, 1942, SerialNo.-461,119

15 Claims.

'Thissinvention'relates torrimprovements inselfloading devices for shaker conveyers Cof :the "type iutilized lier/picking 4up 'loose .material such :as coal, rock,` or theL-likefrom `the ground The principal vobjects fof my invention `are to -1provide a novel .ands'impliedform of self-loadving'de'viceffor shaker conveyersf 'of the type which may fbe moved laterally :across the coal face r.by

.powe'r "and 'including "a simplified 'and improved Vfeeding 'me`ans for the "extensible or pickeup trough 'section fof the rconveye'r, ktogether with `an improved iorm of guide :frame for lguiding land swinging 'this trough .section `from "side 'to A more fspe'cifi'c object "of `my invention is vto provide a: new 'and iimprovedfform of .adjustable land exible mounting for .the .forward ,fend *of lthe *guide -frame, fior fsupporting 'fsa-id f frame for slidable movement`--`along "the ground Still another object of my invention is to pro-w+' `vide fa I'simplied .'form Tof feeding "device, to- :gether with-a :novel "means-1to1' "holding the -ex- -tensible trou'gh 'section 'of the conveyer Afrom -backward fsiipping movement, when :the Iloading Idevice isworking upwardly along agrade.

The'device offmy presentfinvention :is somewhatsimilarito 1 th'at disclose'dlin? my pri'or :Patent ibut differs vlthzrefr'om 1in that 'the feeding .and

IOther'objects ovf-'Inyeinvention willappearfrom tinietotinie las the following Vspecilication i'pro- Acee-tis and with reference --to the accompanying drawings wherein;

:Figure '1 is -a plan viewiof laloadin'g device s constructed in 'accordance'fwithfmy'- invention "Figure/2 fis "a View* in` side eleva-tion of the 'devicasliown in Figure 1; l

Figure '3 "is an` enlarged, detail *fragmentary plan' View, with "certain parts'i'shown" nho'rizontal "section in orde'rtoillustrate certain 'detailswof connection ofthe "swinging lframe to the fstationary base iframe;

:Figuren is A'an enlarged fragmentary lplan -view of the 'forward end -'of the loadingirlevice, with Ucertain 2parts 'broken away LSand 1 certain v"other v"partssliown"in' horizontal section; l

-- Fig-ure- 5l iS "affragm'entary planview ofthe-cen- Ulf) stantially thesame scale as Figure .4 and constitutingin eii'eot ya'continuation of Figure 4;

Figure 6 Iis-an enlarged View in sideelevation "of the forward 'end of the-loading device, with certain parts shown in longitudinalsection;

-Figure' is afragmentary side elevational View of the central portion of .the devcefshown in Figure 1, drawn to ythe same scale as'Figure 6 iandwith certain parts broken'away and certain other parts in longitudinal section;

Figure l8 .is a fragmentary view in sideeleva- -tion somewhat similar to `Figure 7, but showing the means for holdingv the extensible trough sec- Ltion of the conveyor from backward slipping -movement with 'respect to 'the reciprocating vCtrough section;

vFigure'll is an enlargeddetail sectional View Ytaken on line Il-II of Figure 10;

-Figure 12.is an enlarged sectional view Ltaken substantially along lline I'2-l2 yof Figure 6;

lFigure `13 is an enlarged fragmentary detail plan View of .the feeding mechanism, withk the extensibieand reciprocating troughs of the conveyer broken away, and with cert-ain other parts broken away and shown in horizontal section;

Figure 14 is an enlarged fragmentary detail view inside elevation of a portion of one ofthe *feeding links `of vthe feeding mechanism, with `certain partsishowny in longitudinal section; and

Figure .15 is an enlarged vfragmentary detail vi'ewinside elevation offa portion of another of ltheifeeding links of theA feedingmechanism' from that 'shown in Figure 14, with certain `parts shown in .longitudinal section.

In 'the drawings, the embodimentof my `invention illustrated includesgenerally a pick-up member or extensible trough section Hlhaving a shovel H on theforwarcl end thereof, for picking up loosematerial from ltlierground. .Said eX- itensible trough section is mounted for extensible t or -rretractible' movement with respect to vthe .'re-

ciprocating trough section I2, andisaid reciprocating and extensible'troughl sections: arel supported and 'guided in an elongated laterally swingable ""tralfportinofthe loadingldevice, drawnf'tofsb-'-5550frame fgconnectedattits rear endtoa Abase I4,

ior transverse swinging movement with respect to said base.

The base I4 as herein shown is provided with three spaced ground engaging shoes I5, which form a support therefor and which have threaded engagement therewith (not shown) so as to adjust the plane of said base with respect to the ground (see Figures l and 2). The details of this base and the threaded mounting of the ground engaging shoes are not herein shown or described.

since they are no part of my present invention. Said base is adapted to beheld in position on the ground during operation ci' the conveyor by means of a plurality of jacks (not shown) interposed between said base and the mine roof, and forms a support for a reciprocating trough section i6 of a shaker conveyer trough line, and for a swivel generally indicatedlby reference character Il'. Said base also forms a mounting for a pair of winding drums I8, I8 and the drive mechanism therefor, which are adapted-to swing the frame I3 and extensible-and reciprocating trough sections IU and I2 laterally with vrespect to said base by means of flexible cables I8a, Ia wound thereon.

The swivel I1 may be of any well known form and, as herein shown, includes a relatively short intermediate trough section I9 having outwardly ared curved forward and rear ends 20, 2D,.one of which ends is nested within a corresponding curved ilared end 2I of the trough section I6, and the other of which has a curved flared rear end of the trough section I2 nested therein. Said intermediate trough section is pivotally-connected to said trough sections bymeans of pivotal bearing members 23, 23, to form a continuous trough from the reciprocating trough section I2 to the trough section I6, when said reciprocating trough section is at various angular positions with respect to said base. The elongated frame I3, as herein shown, extends forwardly from the swivel I1 along opposite sides of the reciprocating' trough section I2 and the extensible trough section I0, and includes a pair of channeled side frame members 21%, 24, connected together at their forward ends by means of a transverse tube or pipe 25, and suitably braced intermediate their ends, to provide a relatively rigid support and guide for said reciprocating and extensible trough section.

The connection from the rear end o1V the frame I3 to the base Hl is shown in Figure 3 and is somewhat similar to that disclosed in my prior Patent No. 2,280,043, so will only herein be described in so far as is necessary to make my present'invention readily understandable. Said connection 'includes a connecting member 60 herein shown as being transversely pivoted to the rear end of said frame on a transverse shaft 6I. Said connecting member extends along the upper and lower sides of a guide member 62 secured to the base I4 and is pivotally and slidably guided in a transversely extending slot 63 and in a longitudinally extending slot 64, formed in said -guide member, on pins B and B6 mounted in said connecting member. This forms a guide for said frame for horizontal swinging movement about axes coincident with spaced pivotal axes of the bearing members 23, 23 (see Figlue 3),

The reciprocating trough section I2 is mounted on the frame I3 for reciprocable movement with respect thereto on a pair of frusto-conical rollers 22, 22 mounted in brackets 26, 26 projecting laterally from opposite sides of said reciprocating trough section. Said rollers engage V-shaped guides 21, 21 extending longitudinally of said frame', and mounted thereon. In a similar manner, a pair of frusto-conical rollers 28, 28 are mounted at the rear end of said reciprocating trough section and engage V-shaped guide tracks 29, 29, on said frame. (See Figure 3.)

A bracket 30 extends across the bottom of the forward end of 'the reciprocating trough section and upwardly along opposite sides thereof, and is provided with two upright sides 3|, 3I extending upwardly along opposite sides of the reciprocating and extensible trough sections.

' sides has a pair of vertically spaced rollers 32, 32

mounted thereon, which are adapted to have engagement with the upper and lower sides of bearing plates 33, 33, projecting laterally from opposite sides of said extensible trough section. Said rollers thus form a slidable support for said extensible trough section on the forward end of said reciprocating trough section.

The Winding drums I8, I8,'for swinging the frame i3 by power, are independently operable and are no part of my present invention so will not herein be shown or described in detail.. One

; of the cables I8a is trained rearwardly from its winding drum about a sheave 36, and transversely to the side of said frame opposite from said drum about a sheave 31, and from thence is guided forwardly beneath the conveyer and around a sheave 39 at the forward end of said frame. From thence, said cable is trained laterally, and its free end is adapted to be connected to a fixed abutment, to'swing saidframe vto the right in an obvious manner. The other cable I8a is trained rearwardly and around a sheave 40 and thence inwardly around a sheave 4I, and is guided forwardly from said sheave beneath the conveyer to a sheave 42 on the left-hand forward end of said frame, for swinging said,` frame to the left.

The adjustable and lexible support for the -forward end oi the frame I3 includes a ground transverse bar 49.

engaging shoe 44. Said shoe is disposed at the forward end of said frame and extends transversely beneath said frame. A pair of spaced upright supporting ears 45, 45 extend upwardly from the central portion of said frame and have a yoke member 46 pivoted thereto by means of a longitudinally extending pivotal pin 41. Said yoke member forms a pivotal mounting for a Said transverse bar is herein Vshown as having an enlarged central portion 5U in the form of an open rectangle, with parallel vspaced arms 5I, 5I extending laterally in opposite directions, from opposite sides thereof (see Figure 4). Said central portion 5 0 extends around said yoke member and is pivotally connected thereto by a transverse pivotal pin 52, which extends laterally through oppositesides of said open rectangle. A connecting member 53 is mounted between each pair of said arms, adjacent the outer ends thereof, and s pivotally connected thereto by means of a longitudinally extending pivotal pin 54. Said connecting member, as herein shown, has a lower end of a tube or pipe 55 mounted thereon, which is slidably guided within a corresponding tube or pipe 5'6,

, mounted on an inwardly extending support portion 51 of the frame I3. (See Figure 9.)

The pipe 55 is closed at its upper end and is herein shown as having a rod 53 threaded therein. Said rod is journaled in a bearing 59, mounted in the upper end of the pipe 56, and has` a hex head on its upper end so that turning movement of said head will vertically adiustthe pipe 56 Each of said e jal'ogfthe "pipe "'55 and provide La ve'rtical adjustjin nt'fo'r thetforwardnd of thelframefl on'th'e shoe 4A. j Thuisa flexible 'mounting has beenprojviddffr the v'forward end vl0f 'the 1fratrie l 3 oni the shoe "K4, 'which will permit said :traine and 'the "eXtensible fand 'reciprocating troughsfto be vertif `cally 'adjusted with respect 'to the *ground and which'vvill 'permit siaid'sho'e to"r'rove'j"alorg anu'nf evenv bottom without' twisting "Said kxfranre and 'rfc'aiu'sing binding between said 'irarne'andsaid re- "ciproeating anaexterfsible 'troughsectiona I "Upright bearing suciedad-34 arernounted en 'iner'sides ofthe pipes te, 5s 4and areadaptegto diy and'downwardly'therefroin. ySaid Carriel` embers are ConIieCtd'Wth a'ilatlhg frame lvv'3v'loyv`rneansfof an' upper link 14-lan'd'a lower link j .ibjrne nqati'ng frame's is pivotauy'onnected vto opposite sides'oi the forward end'of the bracket 'su `by"means of pivotal pins 1s, 1t "exten-ding' tn ug'hbracket's 11, 1 rtm1-etang tutwardiy ,from Qppositehsides of the bracket 3U 'and through side arms v19, 19 of said floating fra'nie.

Thesidearrn'sl, 19er the oatingfraie 'li'extendforwardly from said pivotal pinsfalon'gopposite -s'iclf-is'of theextensible trouh'ection mand are lconnected to aU-shaped'fo'rward portion'l of said frame, which extends beneath and upwardiy along opposite Sides Vof the extensible trough section and Y f orrns a slidable support -for said' U-shapedportion'on'sad ektens'ible trough section.,Y 'nath olf the f'pifight sdeinrqters 'of the vU-shaped portion 86 has a pair of vertically spaced rollers t2, 8 2 inountedofnithe inner sides thereof andprojecting inwardly therefrom. Drie oisaidrollers is disposed Valcove theot'her *of 4said rollers isdisposed belowthe bearing plate 3,3, to Hforni a slidable support for the'forward end of said iloating frame on said eiiten'sille 'trough-- The carrier members ll, 'il arelheldinaposition s o the .links M, 'M or l5, 'ljwill yengage the grip blocks 1U, 'it with the bearingfplatesr, 33

at the beginning of the forwarder returnstrokes vorfthe conveyor, depending upon whether it is desiredto extend or retract the extensibletrough section, by means of a pairof'spring'sSS, 83`u`rging the upper ends of said carrier'rnembers in a'par f springen, ai, urgingtne forward ends of said carrier'ine'rnbers inl a direction towards the forward enfd'of the conveyer (see'Figu'res '7 and 8) n Eachvspring B3 encircles a'plunger slidably V:nf1ounted ina brackett, projecting upwardly `from the forward end of one upright side of the lilo'afting frame i3. Said spring abuts saidbracket and aicoll'ar Bl on said plungen'and said plunger ismpiv'otally connected to Yan 'ear dprojeeting `forwardly from said carrier meinber, adjacent the upper end thereof.

Y The springs' B14, 8d 'areVv `ririounted"in "ag-manner :sim ilar to the springsf 83,V 83 and 'each ker1-circles 'a ugrss a'd'irection towardsithe rear ofthe conveyor and V o so lengage theoutsides of the hearingipleltsl33lto Y "the are each 'interposed tbetween fa 89a on'the kof@ 'd and'-a'braciet 90, 4forming a 'slida'bleQ portfor Isaid plunger, and urgveth'ei'r "associated `carrier 'member yinto are'arwardlyin- 'lined position.

lt vlshould here vbe `l-lnoted that 'suilicieiit toengage fthevg'rip vblocks Llil, "1B with the bearing plates 33, 33 with siiflieien't' force fio iveftheftehsibre trough sedi-,touwen thereciprocating trough section, butis only su'iii'cient `t'o position said "carrier members so the V'gripping ginriing'of the forward or return 4strokes of'the 'oriveyen without any' slippage vor lost inotio'n. Y

fEach carrierrnmber `'HA isL provided-with an 'ear E' 9 I projecting rearwardlyfromtheupper' end rorjto which fis Connected the 'llink 14 'by downwardly fronti 'said ear, and as herein shown fis "provided with a loif'urcated rear Aend portion tdjlth'e furoations'of which are prlded with longitudinally*extending slotsfr'g. Said slots slidably engage blocks '96', v95"'nf'1`o'u'rited on av transverse shaft lrEil, yon opposite sides of'afholdingcai'n naled noppsite side arms T9, 19 of the oating frame i3, w v k kThe holdingcamv 99 `is adapted to engage va 'iour ma, 'mounted on` the link -1a, forwardly of the' shaft :91, vbetween theiur'cations ofthe bifurcatedjlrear end portion S4 thereof, ion `a pivotal pin 'IDL rI"hus 'when `the holding lcams 99, i99 `are in engag'ementwith the vrollers H10, 100, `the links 14, T4 Will be lield from Slidable'rnV-ment with respect both-e shaft s1, and will 'transmit a. Apullingfforc'e from the forward en'd of therecip rocating trough section I2 `tothe upper endof lthe carrier vine'niloers Hjt'o n-gage the grip blocks "lil, `'Illu/ith thebearing y`plalte--31`a upon the return strokes of "the 'conveyer Upon the forward [strokes or the 'conveyen said links will exert a 'usi pushing forcelo'nftheupper ends loi said carrier lrrie'ribers,'to pivot said earrier'nm-bers ina direction todsengafge said grip blocks "from ysaid rlovaring plates. vThis vv'will retract "the extensible "trougnsection-Hl within the reciprocating trough 'Section 1:2-

' he links 15,*15'are lofV a yieldab'le construction and are each provided with a bifurcated rear end portion |02, theffurcat'ions of which' are provided with longitudinally extending slots`IU3, HB3, slid- `ably engaging blocks |04, lllld'pivotally 'rnounted o n aA transverse "shaftflilS, journaled at its ends in theside ar1ns719,1.9of the "floating'frarnel A holding cam |91 is secured to said shaft, be

tween the blocks IM, [04, and isadapted Vto'engage a roller |08 mounted Abetween the furcations of said bifurcatedfrear endrportion, on a transverse pin H99. "Whensaid'c'ani'is engaged with said roller, said link'will be held from longitudinal sliding fmovement withrespect-to said shaft and blocks, and 'will exert ai pushing 'force on the lower end-of the carrier member 1| upon' the-forward AStrrokes'ofthe conveyer and a pulling force on the lower end or vsaidcarrier memberupon Vthe return strokes' ofthe eonv'eyer, to extend said extensible trough vsection with respect to said *reciprocating trough ysection lwhen the holding forwardly from the bifurcated rear end portion |02 of said links. Said spring is interposed between said bifurcated rear end portion and a shouldered portion ||3 of said threaded member, and the strength of said springs is such that said yieldable links will normally act as solid members and will only yield, to release the grip blocks, upon the forward strokes of the conveyer, when the forward end of the shovel I I engages a solid obstruction.

The operating means for the holding cam 99 includes `a bifurcated lever arm I4, secured to the right-hand end of the shaft 91 and herein shown as projecting upwardly therefrom (see Figure 8). A connecting member ||5 is pivotally connected between the furcations of said lever arm, adjacent the outer end thereof, for movement about an axis parallel to the pivotal axis thereof, and has a rod I6 slidably mounted therein. A stop or collar ||8 is secured to said rod and is adapted to engage the connecting member ||5, so movement of said rod in a direction towards the shovel will pivot the lever arm I I4 in a direction which is shown in Figure 8 to be a clockwise direction. A compression spring ||9 encircles said rod and abuts said connecting member at one of its ends and abuts a head |20 of said rod, at its opposite end. The end of said rod opposite said head is shown as being threaded in a bfurcated connecting member I2 I, which is pivotally connected to a hand operated lever I 22 by means of a pivotal pin |23. Said lever 'is keyed to a shaft |24, extending transversely beneath the extensible trough I0, and journaled at its ends in the side frame members 19, 19. A hand lever |22a is keyed to the opposite end of said shaft, to permit operation of the cams 99, 99 from either side of the machine. Thus, when either of the levers |22 -or |22a are engaged with the hand and are moved towards the forward end of the loading device, the shaft 91 will be turned in the same direction, to disengage the holding cam 39 from the roller |00. Engagement of said holding cam with said roller is effected through the compression spring IIS, when either of said,

hand levers are engaged by the hand and moved towards the rear end of the loading device. Said spring is provided to absorb any shocks which might otherwise be transmitted to said hand lever. f .5

A tension spring |25 is provided to urge the cams 99, 99 into an engaged position. Said spring is connected between a connecting bracket |21 projecting upwardly from the left-hand side arm 19 and a lever arm |26, secured to the opposite.' end of the shaft 91 from the lever arm I4, and

shown in Figure 7 as depending from said shaft.

The holding cams |01, |01 are operated by a hand lever |29 secured to a transverse sleeve |30 which is pivotally mounted on the shaft |24 and is journaled in the side arms 19, 19. Said hand lever is operatively connected with the transverse shaft by a link |3|, having operative connection with a bifurcated lever arm |33, keyed to the shaft |05. Said link has slidable engagement with a connecting member |32, which is pivotally mounted between the furcations of said lever arm I 33, adjacent the upper end thereof. A compression spring |34 encircles the rear portion of said link and is interposed between the connecting member |32 and a nut |35 on said link, to urge saidhand lever in an upright position. A nut |36 is threaded on the end of said link and is adapted to engage the connecting member |32, to move the lever arm |33 towards the rear or the loading device, to disengage the cams |01, |01 from the rollers |08, |08. Said compression spring is so arranged that when moving said hand lever towards the forward end of the loading device, to engage the cam |01 with the roller |08, the lever arm |33 will be moved through said spring, so said spring will absorb any shocks that might be transmitted from the reciprocating trough section to said hand lever.

The shaft |05 is urged in a direction to engage the holding cam |01 with the roller |08 by means of a tension spring |31 connected between the ends of an upright rocking arm |38secured to the shaft |05, and a bracket |39 secured to the side frame member 19, which is the right-hand side frame member when looking towards the forward end of the machine. A hand lever |40 is provided on the end of the sleeve |30 opposite from the hand lever |29, so that operation of the feeding mechanism may be controlled from either side of the conveyer.

Extensible movement of the extensible trough section is limited by means of a pair ofyieldable stops |41, |4|, mounted on opposite sides of the bracket 30 and projecting upwardly therefrom and adapted to engage angles |42, |42 secured to and projecting upwardly from the bearing plates 33, 33, adjacent the rear ends thereof. Retractible movement of the extensible trough section is limited by means of a pair of yieldable stops |43, |43 mounted on opposite sides of the bracket 30 beneath and inwardly of the stops |4|, |4|, and engageable with stops |44, |44 on opposite sides of the forward portion of the extensible trough section.

Referring now in particular to the novel form of means for holding the extensible trough section from backward slipping movement with respect to the reciprocating trough section when the device is operating along an upwardly pitching seam, said holding means includes a pair of carrier members |45, |45, having friction grip blocks |46, |46 mounted therein and adapted to engage the Aupper and lower sides of the bearing plates 33, 33. The holding means are independently operable and the construction and operation of each holding means is the same, so one only will herein be described in detail. The carrier member |45 is mounted in an open central portion of a floating frame |41, and is connected thereto by means of a link |48, pivotally connected to said carrier member, for pivotal movement about an axis coaxial with the axis of pivotal connection of the lower grip block to said carrier member, by means of a bolt |49. The free end of said link is pivotally connected to a lever arm |50,- pivotally connected to the rear portion of the frame |41 on a transverse pin |5| (see Figure 11) Said transverse pin also forms a pivotal connection for said floating frame |41 to a sliding bracket |53, which is mounted for free vertical movement on a pair of parallel spaced guide shafts |52, |52 (see Figures 6 and l2). The shafts |52, |52 are mounted at their lower ends in the frame |3'an`d project upwardly therefrom, and are connected together at their upper ends by means of a stop |55. Said floating frame may thus move vertically with respect to said guide shafts and may also pivot with respect thereto in a vertical plane about the axis of the pin |5I.

The floating frame |41 is provided with supporting rollers |56 and |51 mounted on opposite sides of the open central portion thereof, which ride on the bearing plate 33 and form a support for said frame on said bearing plate. Saidfloattractible movement with respect to said reciprocating trough section, and an equalizing support for the forward end of said frame on the ground for relieving said frame from twisting stresses when transversely moved across an uneven bottom including a supporting shoe slidably movable along the ground, a bar extending transversely of said shoe and mounted thereon for pivotal movement with respect thereto about axes extending both transversely and longitudinally of said frame, and a pair of upright supporting members pivotally connected to said bar, adjacent opposite ends thereof, for movement about axes extending longitudinally of said bar, said supporting members having vertically adjustable supporting connection with said frame adjacent opposite sides thereof for vertically adjusting said frame with respect to said shoe.

5. In a self-loading device for shaker conveyers, a frame transversely movable along the ground, a reciprocating trough section mounted for reciprocable movement with respect to said frame, an extensible trough section guided by said frame and mounted for extensible or retractible movement with respect to said reciprocating trough section, and an equalizing support for the forward end of said frame on the ground for relieving said frame from twisting stresses when transversely moved across an uneven bottom including a supporting shoe slidably movable along the ground, a bar extending transversely of said shoe and mounted thereon for pivotal movement with respect thereto about axes extending both transversely and longitudinally of said frame, and a pair of upright supporting members pivotally connected to said bar, adjacent opposite ends thereof, for movement about axes extending longitudinally of said bar, said supporting members having vertically adjustable supporting connection with said frame adjacent opposite sides thereof for vertically adjusting said frame with movement with respect to said reciprocating trough section, and an equalizing support for the forward end of said frame on the ground for relieving said frame from twisting stresses when transversely moved across an uneven bottom including 'a supporting shoe slidably movable along the ground, a bar extending transversely of said shoe and mounted thereon for pivotal movement with respect thereto about both transverse and longitudinally extending axes, and a pair of upright supporting members pivotally connected to said bar, adjacent opposite ends thereof, for movement about axes extending longitudinally of said bar, said supporting members having vertically adjustable supporting connection with said frame adjacent opposite sides thereof for vertically adjusting said frame with respect to said shoe, and each including a pair of telescopic members, and a threaded member threaded in one of said members and having engagement with said other member, for extensibly moving one of said members with respect to the other.

7. In a self-loading device for shaker conveyers, a frame transversely movable along the ground, a reciprocating trough section mounted for reciprocable movement with respect to said frame, an extensible trough section guided by said frame and mounted for extensible or retractible movement with respect to said reciprocating trough section, and an equalizing support for supporting the forward end of said frame for movement along the ground and for relieving said frame from twisting stresses when transversely moved across an uneven bottom including a ground engaging shoe, a. yoke member pivotally mounted on said shoe for pivotal movement about an axis extending longitudinally of the conveyer, a transverse bar pivotally mounted on said yoke for pivotal movement about an axis extending transversely of the conveyer, and pivotal supporting connections between opposite ends of said bar and said frame.

8. In a self-loading device for shaker conveyers, a frame transversely movable along the ground, a reciprocating trough section mounted for reciprocable movement with respect to said frame, an extensible trough section guided by said frame and mounted for extensible or retractible movement with respect to said reciprocating trough section, and an equalizing support for supporting the forward end of said frame for movement Aalong the ground and for relieving said frame from twisting stresses when transversely moved across an uneven bottom including a ground engaging shoe, a yoke member pivotally mounted on said shoe for pivotal movement about an axis extending longitudinally of the conveyer, a transverse bar pivotally mounted on said yoke for pivotal movement about an axis extending transversely of the conveyer, and a pair of upright supporting members pivotally connected to said bar adjacent opposite ends thereof and having supporting connection with said frame.

9. In a self-loading device for shaker conveyers, a frame transversely movable along the ground, a reciprocating trough section mounted for reciprocable movement with respect to said frame, an extensible trough section guided by said frame' and mounted for extensible or retractible movement with respect to said reciprocating trough section, and an equalizing support for supporting the forward end of said frame for movement along the ground and for relieving said frame from twisting stresses when transversely moved across an uneven bottom including a ground engaging shoe, a yoke member pivotally mounted on said shoe for pivotal movement about an axis extending longitudinally of the conveyer, a transverse bar pivotally mounted on said yoke for pivotal movement about an axis vextending transversely of the conveyer, and a pair of vertically adjustable upright supporting members pivotally connected to said bar adjacent opposite ends thereof and forming a vertically adjustable support for the forward end of said frame on said bar.

10. In a self-loading device for shaker conveyers, a reciprocating trough section, an extensible trough section, feeding means for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, a frame extending along said reciprocating and extensible trough sections, means auxiliary to said feeding means and manually operable to engage said extensible trough section and hold said trough section from backward slipping movement with respect to said reciprocating trough section, and a floating connection between said frame and said holding means including a vertically extending guide member on said frame and having said holding means mounted for vertical slidable movement therealong.

11. In a self-loading device for shaker conveyers, a reciprocating trough section, an extensible trough section, feeding means for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, a frame extending along said reciprocating and extensible trough sections and forming a guide therefor, and means auxiliary to said feeding means and manually operable to engage said extensible trough section and hold said trough section from backward slipping movement with respect to said reciprocating trough section, a slidable connection between said holding means and said extensible trough section, guide members extending upwardly from each side of said frame, and a vertically slidable mounting for said holding means on said guide members.

12. In a self-loading device for shaker conveyers, a reciprocating trough section, an extensible trough section, friction grip feeding means engageable with said extensible trough section during certain strokes of the conveyer for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, a frame extending along said reciprocating and extensible trough sections and forming a guide therefor, and manually operable friction grip holding means auxiliary to said feeding means, for holding said extensible trough section from backward slipping movement with respect to said reciprocating trough section, said holding means including a floating frame slidably supported on said extensible trough section, a pair of friction grip blocks adapted to engage said extensible trough section, a carrier member having said friction grip blocks mounted thereon, a pivotal connection between said carrier member and said floating frame, and a vertically slidable connection between said floating frame and said rst mentioned frame.

13. In a self-loading device for shaker conveyers, a reciprocating trough section, an extensible trough section, friction grip feeding means engageable with said extensible trough section during certain strokes of the conveyer for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, a frame extending along said resaid extensible trough section, a carrier member having said friction grip blocks mounted thereon, a pivotal connection between said carrier member and said floating frame, and a connection between said floating frame and said first mentioned frame including a guide member extending upwardly from said first mentioned frame, and a vertically slidable connection between said floating frame and said guide member.

14. In a self-loading device for shaker, conveyers, a reciprocating trough section, an extensible trough section, friction grip feeding means engageable with said extensible trough section during certain strokes of the conveyer for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, a frame extending along said reciprocating and extensible trough sections and forming a guide therefor, and manually operable friction grip holding means auxiliary to said feeding means, for holding said extensible trough section from backward slipping movement with respect to said reciprocating trough section, said holding means including a floating frame slid- .a ably supported on said extensible trough section,

a pair of friction grip blocks adapted to engage said extensible trough section, a carrier member havin-g said friction grip blocks mounted .thereon,la pivotal connection between said carrier member and said floating frame, and a connection between said floating frame and said first mentioned frame including a guide member extending upwardly from said first mentioned frame, a lmember slidably guided on said guide member, and a transverse pivotal connection between said floating frame and said guide member.

15. In a self-loading device for shaker conveyers, a reciprocating trough section, an 'extensible trough section, feeding means for extensibly or retractibly moving said extensible trough section with respect to said reciprocating trough section, and means auxiliary to said feeding means and manually operable to engage said extensible trough section to prevent backward slipping movement thereof including a carrier member, a pair of friction grip blocks mounted in said carrier member, means Imanually loperable for engaging said grip blocks with said extensible trough section, a frame held from reciprocating movement, a connection between said frame and the lower end of said carrier member including a lever arm pivotally mounted on said frame, and means for causing said grip blocks to be automatically disengaged from said extensible trough section during the forward strokes of the conveyer including a yieldable link pivotally connected to said frame at one of its ends, an arm ciprocating and extensible trough sections and forming a guide therefor, and manually operable friction grip holding means auxiliary to said feeding means, for holding said extensible trough section from backward slipping movement with respect to said reciprocating trough section, said holding means including a floating frame slidably supported on said extensible trough section, a pair of friction grip blocks adapted to engage depending from said lever arm and having operative connection therewith, and a pivotal connection between the free end of said arm and said yielclable link, to permit yieldable movement of said lever arms and disengagement of said grip blocks from said extensible trough section during the forward strokes of the conveyer.

LOY D. HAGENBOOK. 

